Browser feature detection fails for Safari 11.0

We have https://gitlab.tugraz.at/dbp/web-components/toolkit/-/blob/master/packages/common/misc/browser-check.js which checks some features we need to show a warning on unsupported browsers.

For some reason Safari 11 (on browser stack) fails to load with a javascript error and the loading spinner never ends (expected), but our browser check doesn't trigger and no error message is shown (unexpected).

changed the description

We added some more checks in #38 (closed) which bump the requirement to safari 12.1, so this is no longer an issue.

We now also use babel to process the output instead of the input which might have fixed this (in case some too new javascript slipped through)

closed